If Zabbix is logging to syslog then after an upgrade to Zabbix 2.2.2 you will see changes in the application names appearing in syslog:
The old, incorrect names (on the left) contained a space which is not allowed by RFC 5424 for APP-NAME. If you are using regular expressions in monitoring of syslog you may want to adjust them for the new application names.
Corrected typo in discovery rule description on template Template SNMP Disks.
In order to fix it, import the template from https://www.zabbix.org/wiki/Zabbix_Templates/Official_Templates.